John Deere 8320RT, 8345RT and 8370RT Tractors Repair Manual (TM119319)

What's Covered in This Manual

This is the Repair Manual (TM119319, dated 30AUG15) for three of John Deere's large rubber-track tractors: the 8320RT, 8345RT and 8370RT, specifically covering machines within serial number range 912001 through 916999 - the manual's own cover page is explicit about this serial range, so confirming your specific tractor falls within it matters before relying on this edition. This is a repair-only manual, built for the technician who already knows what needs fixing and needs the disassembly, inspection, and reassembly procedures to do it.

These tractors could be ordered with either of two very different transmission technologies, and the manual gives each one its own full section: the Infinitely Variable Transmission (IVT), a continuously variable design with no fixed gear steps, or the E23 transmission, a 23-speed Power Shift unit. Each transmission section covers component removal and installation, in-tractor repair, full transmission teardown, and reassembly - genuinely different procedures depending on which transmission the specific tractor carries.

The electrical section covers the CommandARM control module - John Deere's integrated armrest-mounted control system for these large tractors - along with the monitoring system, implement and accessory connectors, and the full charging and starting circuits. Beyond the transmission and electronics, the manual covers the complete drive train (rear axle, steering gears, final drives, PTO, and mid-frame drive shafts), brakes, steering, and the hydraulic system including the integrated hydraulic pump and the hitch valve and selective control valves that operate towed and mounted implements. For anyone performing a real repair on one of these three track tractors, this manual has the complete factory procedures needed to do the job correctly.

Table of Contents

• Section 10 - General Information - safety, general references
• Section 20 - Engine - component removal/installation, engine repair
• Section 30 - Fuel, Air Intake, Exhaust, and Cooling - diesel fuel system, air intake, radiator, exhaust
• Section 40 - Electrical - connectors, charging/starting circuits, CommandARM, monitoring system
• Section 50A - IVT Transmission - component removal/installation, in-tractor repair, transmission rebuild
• Section 50B - E23 Transmission - component removal/installation, in-tractor repair, transmission rebuild
• Section 50C - Drive Train - rear axle, steering gears, final drives, PTO, drive shafts
• Section 60A/60B - Brakes and Steering - service brakes, steering column, valves, pump and motor
• Section 70 - Hydraulics - hydraulic system, integrated pump, hitch valve, selective control valves